Solenoid construction



Jan. 14, 1930. P. J. DUGANY 1,743,196

SOLENOID CONSTRUCTION Original Filed June 6. 1927 INVENTOR Farc/fawn 1 :ATTO EYS.

Patented Jan. 14, 1930 PATENT OFFICE PETER J. DUGAN, or NEW Yonx, N.. Y.

soLENorn CONSTRUCTION Original application led June 6, 1927, Serial No'. 196,677. Divided and this application led December 29, 1927. Serial No. 243,354.

This invention relates to solenoid construc tion and this application is a division of application Serial No. 196,677 iiled June 6, 1927.

More particularly stated, the invention re- 5 lates to a double solenoid structure for imparting reciprocatory movement in opposite directions although the invention is not limited to a pair of solenoids but is adapted for use with a single solenoid.

The invention has for its salient object to provide a. solenoid structure so constructed and arranged that a maximum movement-ot` the solenoid core can be obtained with a minimum width or depth of the solenoid winding or coil.

Another object of the invention is to provide a solenoid structure comprising a winding and a telescopng core so constructed and arranged that the core is moved under the action of the coil a distance greater than the depth or width of the coil or winding.

AAnother object ofthe invention is to pro vide a solenoid structure having cushioning or checking means for cushioning the movement of the solenoid core.

Further objects of the invention will appear from the following .specification taken in connection with the drawin which form a art of this application, and 1n whichig. 1 is a sectional elevation illustrating one embodiment of the invention; and

Fig. 2 is a sectional elevation illustrating another embodiment of the invention.

The invention brieiiy described consists of other, the central or inner core section being common to both solenoids. The two solenoids are further provided with means for .checking or cushioning the movement of the cores either direction.

asolenoid comprising a` winding or coil and tions adapted to telescope, one within the' Further details of the invention will appear from the following description.

In the form of the invention illustrated there are shown a pair of oppositely acting solenoids '1Q and 2O adapted to eiiect reciproeating movements in opposite directions. VEach solenoid has the usual solenoid winding closed as shown at 17, the closed end having a central opening 18. A valve casing 25 is secured to the central portion of the closed end 17 in casing 15 and the valve casing has a port 26 controlled by an inwardly seating ba l check valve 27 and also has a port 28, the size of the port 28 being controlled by an adjustable needle valve 29.

The sleeve 12 has a flange 30 at its inner end slidably mounted in the casing 15 and a packing washer 31 is secured between the fiange 30 and a collar 32 threaded on the inner end of the sleve 12.

The sleeve 12 has 'abearing ring 35 formed of brass or other non-magnetic material secured within its outer end and forming a bearing for the sleeve 13. The sleeve 13 has a collar 36 of non-magnetic material secured to its otherend and slidably mounted within the sleeve 12.

The sleeve 13 has secured within its outer end a bearing ring 37 of non-magnetic material which forms a bearing for the inner section 14 of the solenoid core. core section 14 has mounted thereon a nonmagnetic collar 40 which is slidably mounted in the sleeve 13.

The other end of the inner section 14 of the core has mounted thereon a collar of non-magnetic material which is' slidably mounted in the inner sleeve ofthe oppositely acting-solenoid. Since both of the solenoids are constructed in exactly the same manner,

the description of the other solenoid need not be described in detail.

One end of the l of the inner core section 14 and can be connected to any element to which it is desired to impart reciprocating movement.

For convenience in referring to the oppositely acting solenoids, they have been indicated on the drawings as C and D. In Figs. 1 and 2 the solenoid C has been energized and the core sections have been telescoped, thus moving` the bar to the right. In order to effect movement in the opposite direction the solenoid D must be energized, whereupon the telescoping cross sections-of solenoid D will be drawn within the solenoid coil, thus ef ectingthe movement ofthe bar to the left. When the bar is moved to the left, the ball check valve 27 o solenoid C will be closed and air will be admitted tothe casing 15 through the restricted inlet port 28 which is controlled as to size by the needle valve 29. As the solenoid sections of the solenoid D move out of the solenoid winding or coil, their movement is controlled by the restricted adf' mission of air to the casing 15 and the movement of the solenoid core is cushioned. During the movement of the telescoping sections of one solenoid out of the solenoid winding the sections of the other solenoid core will move into the casing on which the winding is positioned and during this operation the check valve secured to that casing will open and permit the emission of air therefrom.

In Fig. '2 a slightly different form of cushioning mechanism is illustrated. In this form of the invention the solenoid coresare formed in three telescoping sections as in' the other embodiment of the invention, but the sleeves or sections have one end closed as shown at 56. The central section 57 of the core consists of a hollow tube having a restricted passage 58 'at the longitudinal center thereof and controlled as to size by a needlevalve 59. Oil or other suitable viscous material is positioned within the chamber formed in one of the sections 55, as for instance in the chamber formed in the section 55 of the solenoid D. When this solenoid is energized and the core `sections are telescoped, the oil or other material will be forced through the is obtained.

restricted passage 5S of the central core section 57 into the chamber formed in the section 55 of the solenoid C. Thus a cushioning eiect Attention is called to the fact that in the operation of the solenoids the outer, core sections draw the inner sections successively into gnetic field of the section 12 is drawn into the solenoid winding 11, section 12 draws with it sections 13 and 14 and section 13 is then in the magnetic field ofthe winding and draws section 14 into the 4field whereupon the inner section 14 is drawn into thewinding or-solenoid coil.

From ,the foregoing specificationxit will be seen that a simple and practical form of solenoid construction has been provided and that the structure described will elect a maximum movement of the core for a minimum depth or Width of solenoid winding. Furthermore, it will be clear that the recprocation of the core will be effectively checked or cushioned in either direction, thus particularly adapting the solenoid structure for use in operating doors, such as elevator hatchway doors.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that ychanges in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

What I claim s: 1. In combination, a member to be moved 1n opposite directions, a pair of oppositely acting solenoids, a common core element for said solenoids, and a connection between said core element and the member to be moved, said connection being disposed between said solenoids. p

2. 4Operating mechanism for imparting reciprocating motion in opposite directions comprising a pairnof solenoid coils and telescoping cores forssaid solenoids having a eomm'on central core section.

3. Operating mechanism for imparting reciprocating motion in opposite directions comprising a pair of solenoid coils and telescoping cores, for said solenoids having a common central core section, and non-magnetic insulating meansbetween the telescoping sections of the cores. v

4. A solenoid comprisinga solenoid coil, a tubular core section movable into said coil, and a second tubular core section slidably mounted in said 'first section and movable into said section under the action of the magnetized coil after the first section has been drawn into said coil.

5. A solenoid comprisin a solenoid coil, a tubular core section mova le into said coil, and a second tubular core section slidably mounted in said first section and movable into said section under the action of the magnetized coil after the rst section has been drawn into said coil, and coacting means on said sections whereby the first section will draw the second section into the magnetic elld when the first section is drawn into the co1 6. A solenoid comprisin a winding, a hollow core member movable 1nto said winding, and a second core member movable into said first member and into the solenoid winding,

Asaid second core member being insulated member connecting said cores, and means coacting with said cores for cushioning the movement of said cores in either direction.

8. In combination, a pair of oppositely acting solenoids, a telescoping core for each solenoid, a member connecting said cores, and means Coacting with said cores for cushioning the movement of said cores in either direction.

9. In combination, a pair of oppositely acting solenoidseach solenoid having a te1escoping core, the inner core being common to both solenoids, and means controlled by said cores for cushioning the movement of said cores in either direction.

10. In combination, a pair of oppositely acting solenoids, each solenoidhaving a telescoping core, the inner core being common to both solenoids, and pneumatic means controlled by said cores for cushioning the movement. of said cores in either direction.

11. In combination, a pair of oppositely acting solenoids, each solenoid having a telescoping tubular sectional core, the inner core being common to both solenoids, and means controlled by said cores for cushioning the movement of said cores in either direction.

In witness whereof, I have hereunto set my hand this 27 th day of December, 1927:

PETER J. DUGAN. 

